listdemo.java

来自「beginJsp2.0外文书籍源代码」· Java 代码 · 共 38 行

import com.wrox.utilities.User2;

import java.util.*;

public class ListDemo
{
  public static void main(String[] args)
  {
    User2 user1 = new User2("H Wyatt", "123-444-4444");
    User2 user2 = new User2("A Brimacombe", "123-555-5555");
    User2 user3 = new User2("K Ibidibbydodah", "123-666-6666");

    List userList = new ArrayList();
    userList.add(user1);
    userList.add(user2);
    userList.add(user3);

    System.out.println("Before sorting:");
    iterateNames(userList);

    System.out.println("After sorting:");
    Collections.sort(userList);
    iterateNames(userList);
  }

  public static void iterateNames(List userList)
  {
    Iterator iterator = userList.iterator();
    while (iterator.hasNext())
    {
      User2 user = (User2) iterator.next();
      System.out.print("  ");
      System.out.println(user.getUsername());
    }
  }

}